[Metrics] Re-enable flaky FamilyUserMetricsProviderTest

I was unable to reproduce the flaky failure, which is a DCHECK error
in an unrelated file. I suspect the error is due to daylight savings
time changes. This CL re-enables the flaky tests. I will reassign the
bug to the file owners.

Bug: 1144651
Change-Id: I59224e96031dc27bd6839c43ccc3f7b3b6936431
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2531015
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Auto-Submit: Toby Huang <tobyhuang@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826283}

chrome/browser/metrics/family_user_metrics_provider_browsertest.cc

@@ -117,8 +117,7 @@ class FamilyUserMetricsProviderTest
   base::test::ScopedFeatureList scoped_feature_list_;
 };
 
-// TODO(crbug/1144651): Test disabled due to flaky failures.
-IN_PROC_BROWSER_TEST_P(FamilyUserMetricsProviderTest, DISABLED_UserCategory) {
+IN_PROC_BROWSER_TEST_P(FamilyUserMetricsProviderTest, UserCategory) {
   base::HistogramTester histogram_tester;
   // Simulate calling ProvideCurrentSessionData() prior to logging in.
   // This call should return prematurely.
@@ -154,10 +153,10 @@ IN_PROC_BROWSER_TEST_P(FamilyUserMetricsProviderTest, DISABLED_UserCategory) {
 INSTANTIATE_TEST_SUITE_P(
     ,
     FamilyUserMetricsProviderTest,
-    testing::Values(FamilyUserMetricsProvider::LogSegment::kSupervisedUser,
+    testing::Values(FamilyUserMetricsProvider::LogSegment::kOther,
+                    FamilyUserMetricsProvider::LogSegment::kSupervisedUser,
                     FamilyUserMetricsProvider::LogSegment::kSupervisedStudent,
-                    FamilyUserMetricsProvider::LogSegment::kStudentAtHome,
-                    FamilyUserMetricsProvider::LogSegment::kOther));
+                    FamilyUserMetricsProvider::LogSegment::kStudentAtHome));
 
 class FamilyUserMetricsProviderGuestModeTest
     : public MixinBasedInProcessBrowserTest {